YSS240

YSS240 (KP2S) is an LSI used to carry out digital signal processor for "Karaoke" systems.There are some features as follows.First is built in 3-channel 15-bit floating A/D coverters and 1-channel D/A converter handle audio signal from L,R,Microphone channels.The second is de-emphasis processing for digital audio input signal.Besides, digital signal can be input directly, and it is possible to output digital signals to oversampling digital filter or DACs.Furthermore, it is necessary to connect 256K bit (32K*8) pscudo SRAM for external memory.The fifth is mixing, fade-in and fade-out processing for digital/analog signals.The sixth is microphone echo processing up to a maximum 200ms.The eighth is surround signal processing with 4 preset patterns.The ninth one is that the register controlled by microprocessor is compatible with YSS216B's method.The last one is 5 V single power supply, Si-gate CMOS process.

What comes next is about the absolute maximum ratings of YSS240.The VDD (power supply voltage) is from -0.5 V to +0.7 V.The VIN (input voltage) is from -0.3 V to VDD+0.3 V.The Top (operating temperature) is from 0 to 70.The Tstg (storage temperature) is from -50 to +125.Then is about the recommended operating conditions.The minimum VDD (power supply voltage) is 4.5 V,the typical is 5.0 V and the maximum is 5.5 V.The minimum Top (operating temperature) is 0, the typical is 25 and the maximum is 70.

The following is about the DC characteristics of YSS240.The maximum IDD (power supply current) is 80 mA at VDD=5.0 V.The minimum VIH (input high voltage) is 2.0 V applicable to input terminals except XI,/IC,TI and 3.5 V applicable to XI,/IC,TI terminals.The maximum VIL (input low voltage) is 0.3VDD V.The minimum VOH1 (output high voltage) is VDD-1.0 V V at IOH=-0.4 mA applicable to output terminals except MA0-14,MD0-7,/CE,/OE,/WE and 2.8 V applicable to MA0-14,MD0-7,/CE,/OE,/WE.The maximum VOL (output low voltage) is 0.4 V at IOL=1.6 mA.